52 lines
673 B
C
52 lines
673 B
C
#include <pentabug/rc5.h>
|
|
|
|
#include <pentabug/hal.h>
|
|
|
|
#define HALF_BIT_TICKS 68
|
|
|
|
static uint8_t toggle = 0;
|
|
|
|
static void send_bit(uint8_t bit) {
|
|
ir_set(!bit);
|
|
wait_ticks(HALF_BIT_TICKS);
|
|
|
|
ir_set(bit);
|
|
wait_ticks(HALF_BIT_TICKS);
|
|
}
|
|
|
|
static void send_byte_part(uint8_t byte, uint8_t length) {
|
|
int8_t i;
|
|
|
|
for(i = length - 1; i >= 0; --i) {
|
|
send_bit(byte & (1 << i));
|
|
}
|
|
}
|
|
|
|
void rc5_send(struct rc5_data *data) {
|
|
// start bit
|
|
|
|
send_bit(1);
|
|
|
|
// field bit
|
|
|
|
send_bit(!(data->code & (1 << 6)));
|
|
|
|
// control bit
|
|
|
|
send_bit(toggle);
|
|
toggle = !toggle;
|
|
|
|
// address
|
|
|
|
send_byte_part(data->addr, 5);
|
|
|
|
// command
|
|
|
|
send_byte_part(data->code, 6);
|
|
|
|
// done
|
|
|
|
ir_off();
|
|
}
|
|
|